Tobacco pipe



Jan. 8, 1935. G R. MCALLASTER v I 1,987,407

TOBACCO PIPE Filed May 8, 19153 [N ENTOR Patented Jan. 8, 1935 UNITEDSTATES PATENT OFFICE My present invention relates to smokers articlesand more particularly to tobacco pipes, and it has for its object toprovide an improved article of this nature that will be simple inconstruction, pleasing in appearance, readily disassembled and whichwill produce a cool smoke without liability of the offensive anddistasteful products of combustion entering the user's mouth. Theimprovements are directed in part toward the provision of an exteriorlyexposed heat radiating element in the smoke path for eifecting thecooling and toward a particular shaping of the interior of the stemwhereby an absorbent renewable cartridge may be advantageously disposedto collect the fluid residue. 7

To these and other ends, the invention resides in certain' improvementsand combinations of parts, all as will be hereinafter more fullydescribed, the novel features being pointed out in the claims at the endof this specification.

In the drawing:

Fig. 1 is a side elevation of a tobacco pipe of a conventional typeconstructed in accordance with and illustrating one embodiment of myinvention;

Fig. 2 is an enlarged vertical central longitudinal section therethroughbut with a portion of the bit or mouth piece broken away;

Fig. 3 is a fragmentary horizontal section taken on the line 3-3 of Fig.2, with the grate removed and looking in the direction of the arrows;

Fig. 4 is a detail plan view of the absorbent cartridge holder,detached, and

Fig.5isaviewsimilartoFig.2buton the scale of Fig. 1. showing a modifiedembodiment of the invention.

Similar reference numerals throughout the several views indicate thesame parts.

Referring more particularly to the drawing, 1 indicates the pipe bowl, 2the stem proceeding integrally therefrom, as usual, and 3 the bit ormouth piece having the usual bore 4 constituting the smoke passage. Thestem 2 is bored out on a larger diameter than usual to provide a cavity5 that merges into the tobacco chamber 6 and the said stem is connectedto the bit 3 by an extension of the latter consisting of an interposedmetallic coupling '1 of some non-corroding material of high or at leastsubstantial heat-transwhere it conforms to the stem and bit design butis preferably fashioned in a plurality of spaced annular fins or ribs 10to increase its surface area and hence its heat-radiating propensities.

Thesmoke arising from combustion in the bowl 6 is drawn through thecavity 5 in the stem, through lateral openings 11 in the coupling tubeand thence passes down the passage 12 formed by the tube to the bore 4in the bit. Its heat is absorbed by the metallic coupling products ofcombustion carried in suspension by the smoke are attracted to thecooler coupling tube and collect in a gummy coating on the outer surfaceof the extension 13 from which they can be readily wiped off upondetaching the coupling from the stem. The interior can becorrespondingly cleaned by removing the plug 14 and running the ordinaryflush cleaner through the bore 12.

In addition to these provisions, I provide other means for collectingand removing these accumulations, particularly the more fluid bodies,resulting to some extent at least from the mixing of saliva therewith inthe region of the junction of the bottom of the tobacco chamber 6 in thebowl with the cavity 5 in the stem. This means is in the form of apreferably flat strip 15 of ordinary blotting paper or similar absorbentmaterial which is laid along the bottom of the said cavity and extendsinto the bowl. A detachable holder is provided therefor which, in thepresent instance, consists of a wire 16 looped back and forth, as shownin Fig. 4, to give it a wider supporting surface while exposlng as muchas possible of the absorbent element. At its inner end, it terminates ina ring 17 that is slipped over the extension of the coupling 13 to lodgeat its base while its outer end is bent upwardly, inwardly anddownwardly at 18, providing a spring hook that clamps that end of thecartridge strip. The intermediate portion of the cartridge lies againstthe bottom of the extension tube and between it and the body of heholder. It is obvious that this holder may thus be readily detached,cleaned and fitted with a new cartridge when desired upon disconnectingthe coupling from the stem.

The provision or the ring 17 in mounting the cartridge holder permitsthe removable bit or, rather, the extension '7 having the tube 13, torotate relatively to the holder in taking the pipe apart, so the holderis not revolved around the interior of the chamber 5 in this operationand there is no tendency toward distorting strains between it and theleg 21 of the grate.

This last mentioned feature of my invention lends itself to and combineswith the purposes of the invention disclosed in my copendingapplication, Serial No. 845,645, filed December 5, 1932, in which Idescribe and claim a detachable grate for the tobacco chamber in thebowl which prevents the tobacco and the ashes thereof from reaching andclogging in the bottom or the chamber forming what is termed a heel.Such a device is shown herein at 19 consisting of a spiral wire coilfastened to the bowl by a clip 20 and spaced from thebottom of thechamber by a leg 21. This forms a clear space 22 into which thecartridge 15 projects to perform the functions above described.

In Fig. 5, I show a very much simplified modification of the cartridgefeature. Therein the bit 3 and stem 2' are merged, being made in onepiece to fit directly into the bowl 1 at 23. An enlarged chamber 5- isprovided as before in com-. munication with the smoke passage 4' andextended at 24 at one side of the latter to form an anchorage or holderfor the inner end-of an absorbent cartridge 15 not otherwise supportedbut which extends-into the space 22" as before. This is a cheapconstruction that may be sold at a very low price.

I claim as my invention:

1. In a tobacco pipe, the combination with a bowl and a stem embodying abore and a relatively enlarged cavity communicating with the bowl andwith the bore, of a bit and a tubular metallic coupling embodying anexteriorly exposed heat radiating surface connecting the bit and thestem and having a reduced extension occupying the cavity in the latterin spaced relationship to its walls, the outer end of the extensionbeing closed by a removable plug and smoke ports being provided thereinnear its base at a distance from the plug.

2. In a tobacco pipe, the combination with a bowl and a stem embodying abit having a bore and a relatively enlarged cavity communicating withthe bowl in alinement with the bore, of an absorbent cartridgeconsisting of a long flat strip of material occupying the cavity in aposition 011- set from the axis of the bore so as not to obstruct tridgeholder detachably and rotatably mounted on the tube to position thecartridge within the cavity and bowl.

4. In a tobacco pipe, the combination with a bowl and a stem embodying abore and a relatively enlarged cavity communicating with the bowl inalinement with the bore, of an absorbent cartridge occupying the cavityin a position offset from the bore so as not to obstruct the same, adetachable metallic smoke conducting tube in continuation of the stemextending into the cavity and provided with lateral ports, and aremovable cartridge holder detachably carried on the tube to position anabmrbent cartridge within the cavity and bowl.

5. In a tobacco pipe, the combination with a bowl and a stem embodying abore and a relatively enlarged cavity communicating with the bowl andwith the bore, of an absorbent cartridged occupying the cavity in aposition offset from the bore so as not to obstruct the same, adetachable metallic smoke conducting tube extending into the cavity andprovided with lateral ports, and a removable cartridgeholder detachablycarried on the tube to position an absorbent cartridge within the cavityand bowl, said holder comprising a ring at its inner end slipped overthe tube and a retaining hook at its outer end bent upwardly, rearwardlyand downwardly within the bowl.

6. In a tobacco pipe, the combination with a bowl and a stem embodying abore and a relatively enlarged cavity communicating with the bowl inalinement with the bore, of an absorbent cartridge occupying the cavityin a position offset from the bore so as not to obstruct the same, saidcartridge also extending into the bottom 0! the bowl, a detachablemetallic smoke conducting tube in continuation of the stem extended intothe cavity, a removable cartridge holder detachably and rotatablymounted on the tube to position the cartridge within the cavity andbowl, and a grate in the latter provided with a spacing leg'holding itabove the bottom of the bowl and protecting the adjacent portion of thecartridge from solid matter while leaving the said cartridge tree toabsorb fluids.

GEORGE R. McALLABTF-R.

